Lock mechanism



NOV. .6, 1934. A. G LYQNS 1,979,893

LOCK MECHANISM Filed Sept. 5, 1931 FIG. 1.

INVENTOR. Ar'T'l-Lur' E1. .L. 1 cm.s

BY I

L ATTORNEY Patented Nov. 6, 1934 v LOCK MECHANISM Arthur G. Lyons,Pennside, Pa, assignor to Reading Hardware Corporation, Reading, Pa, a

corporation Application September 3, 1931, Serial No. 561,053

4 Claims.

This invention relates to improvements in lock mechanisms.

The primary object of this invention is the provision of an improvedlock mechanism embodying a lock bolt of such nature as to prevent aburglar from sawing through the same.

Burglars very often saw off the lock bolts by insertion of a fine sawbetween the face plate and door jamb. It is an object of this inventionto prevent the sawing off of the lock bolt by movably mounting thelatter upon a retractible lock bolt frame in such manner that the lockbolt will move with the saw. It is thus substantially incapable of beingsevered by sawing.

A further object of this invention is the provision of an improved lockmechanism embodying a dual lock bolt construction mounted upon a singlelock bolt retractible frame.

Other objects and advantages of this invention 2 will be apparent duringthe course of the following detailed description.

In the accompanying drawing, forming a part.

of this specification, and wherein similar reference charactersdesignate corresponding parts throughout the several views,

Figure 1 is a fragmentary plan view of a lock mechanism showing thatportion of the same which includes the lock bolt details and theassociated mechanism, with the lock bolts retracted.

Figure 2 is a View similar to Figure 1 with the lock bolts projectedfrom the face plate of the lock case, in looking position.

Figure 3 is a sectional view taken through the portion of the lock boltframe upon which the lock bolts are rotatably mounted.

Figures 4 and 5 are fragmentary sectional views taken substantially ontheir respective lines in Figure 1 of the drawing.

In the drawing, wherein for the purpose of illustration is shown only apreferred embodiment of the invention, the letter A may generallydesignate the lock mechanism, which may include a case B of any approvednature having the improved lock bolt mechanism C associated there-'with. "A look or other means I) is mounted upon the case B foractuating the tumbler mechanism E and the retraction or projection ofthe lock bolt mechanism C.

The lock case B may include a face plate 10,

preferably differentiating from conventional construction in that it isprovided with a pair of circular openings 11 and 12 for the slidablereception of the cylindrical lock bolts 13 and 14 respectively, of thelock bolt mechanism C to be subsequently described. The case Bfurthermore includes the opposite side walls 15 and 16, as shown inFigure 5, and the marginal boundary walls 17, of any approved nature andconstruction, since the application of the improved lock or dead boltmechanism may be made to pracf tically any type of lock mechanismembodying a movable locking bolt.

The lock bolt mechanism C preferably includes a reciprocating frame 20mounted in the lock case, and having a slot 22 therein which lies normalto the length of the face plate, and which assists in guiding the lockframe 20 towards and away from the face plate. A fixed fence or stump 23is rigidly carried by one of the side walls of the case B, the samebeing polygonal in cross section and extending through the space 22 toenable the above mentioned guiding of the lock bolt frame 20. At its endfacing the face plate, the frame portion 20 of the lock bolt mechanism Chas a flange 25, which, as is shown in the 5. drawing, is provided witha pair of sockets 2'7 and 28 for the rotatable seating of the inner endsof the cylindrical lock bolts 13 and i l therein. These sockets may becircular in plan if desired, or as shown in the drawing the surface ofthe frame 20 facing the face plate may be flanged at its opposite endsand in the center to provide the sockets 27 and 28, which open atopposite sides.

The lock bolts 13 and 14 are preferably of 5?. solid hardened steel.They are preferably of the same size and cylindrical in cross section.At their inner ends each of the same is annularly grooved at 30, or inlieu of such groove the said ends of the lock bolts may be annularlyflanged to serve the same purpose. A detachable plate clip 35 is held bya machine screw or bolt 37 in place upon the face plate facing surfaceof the frame 20, as shown in Figures 1, 3 and 5 of the drawing, andwhich is shaped to marginally enter the annular grooves of the lockbolts for the purpose of retaining the latter in their respectivesockets. This clip retains the bolts in their sockets so that they mayreadily rotate. The lock bolts are of such length that when the lockmechanism C is fully retracted the outer ends of the lock bolts stilllie in the face plate openings 11 and 12 provided therefor, with theouter ends of the lock bolts flush with the jamb facing surface of theface plate, as shown in Figure 1. Thus there is no tendency of the lockbolts to be tipped out of position from the supporting frame 20.

Any approved type of tumbler mechanism and cam operating mechanism maybe provided for 1 actuating the lock bolt mechanism C. By way ofillustration there is shown a slidable tumbler 40 which is springactuated at 41, and which depresses in a line normal to the path ofmovement of the lock bolt mechanism, in order to cooperate with thestump 23 for actuating the bolt mechanism into locked or unlockedpositions. The actuating lock D may include any approved type of cam armor roll back construction 45 for depressing the tumbler 40 in order toactuate the lock bolts.

The lock bolts 13 and 14 of course are freely rotatable upon thesupporting frame 20, and When in projected position as shown in Figure 2it can readily be understood with What difficulty a burglar would meetin an attempt to saw through either of the lock bolts. The bolts wouldmerely turn with movement of the saw.

Various changes in the shape, size, and arrangment of the of the detailsof the lock bolt mechanism and the case and associated structure may bemade to the form of invention illustrated and described, withoutdeparting from the spirit of the invention within the scope of theclaims.

I claim:

1. In a lock mechanism the combination of a casing, a lock boltmechanism including a nonrotatable rectilinear slidable frame in thecasing, a cylindrical shaped elongated lock bolt member having anexternal continuous circumferential groove at its inner end, means uponthe slidable frame extending into said groove and connecting the boltmember for unrestricted rotation in either direction upon said frame andfor rectilinear sliding therewith, and means for reciprocating the lockbolt mechanism in order to project or re" tract the freely rotatablebolt member with respect to the casing.

2. In a lock mechanism the combination of a casing, a lock boltmechanism movably mounted therein including a non-rotatable rectilinearslidable frame, a plurality of elongated substantially cylindricalhardened steel bolt members having their inner ends each provided withan endless circumferential groove, and a detachable detent mounted uponthe said frame and extending into both of said grooves to prevent thelongitudinal movement of the bolt members away from said frame andpermitting their free rotational move ment to any degree in eitherdirection, the casing having openings therethrough for slidableextension of the bolt members.

3. In a lock mechanism the combination of a casing, a lock boltmechanism movably mounted in the casing including a non-rotatablerectilinear slidable frame, a plurality of elongated substantiallycylindrical hardened steel bolt members each having similar endsprovided with an external endless circumferential groove, a singledetachable detent upon the frame located in a space between said boltmembers projecting into each of said bolt member grooves to mount thesaid bolt members upon the frame against longitudinal movement awaytherefrom and permitting free and full rotational movement of each ofthe bolt members thereon to any degree in either direction about therespective axes thereof, the said casing having a wall provided withopenings therein slidably receiving and supporting the said bolt membersoutwardly beyond the said detent.

a. In a lock mechanism the combination of a casing, a lock boltmechanism including a nonrotatable rectilinearly slidable frame mountedin the casing, a cylindrical-shaped elongated lock bolt member seatedupon said slidable frame for unrestricted rotation in either directionabout its axis, the said lock bolt member at its end adjacent to theslidable frame having a flange, and means upon the slidable frame rigidtherewith disposed forwardly of said flange to prevent a longitudinalmovement of the said bolt member away from its seat upon said frame andpermitting the unrestricted free rotational movement of the bolt memberto any degree in either direction about its axis.

ARTHUR G. LYONS.

